<!DOCTYPE html>
<html>

<head>
  <meta http-equiv="Content-type" content="text/html; charset=utf-8" />
  <style>
    body {
      background-color: rgb(255, 255, 255);
    }
  </style>
</head>

<body>
  <div id="drop_area" style="border:3px dashed silver;width:200px; height:200px">将图片拖拽到此</div>
  <button id="btn_upload"> 上传文件 </button>
</body>

<script src="https://code.jquery.com/jquery-3.6.0.min.js"></script>
<script src="./jcUtils.js"></script>
<script src="./main.js"></script>
</html>